Why is my LG Lucky Battery not holding a charge?

On October 26, 2015 I bought a new LG Lucky phone and so far a couple of the days I have had it the charge has been good with no issues. However there have been more days like today where I've taken it off the charger at a 100% and within 3 hours it is at 30%. I know it's not searching for a signal I have 3+ bars, I keep my screen brightness and the lowest it will go, and I don't use it a ton - maybe a few texts here and there. I'm not doing any heavy use of it or the apps.

Welcome to Android Central! Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:

1. The main Settings>Battery screen.
2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
3. The Screen category (to see total Screen On time).
4. The Cell Standby category, if present (to see Time Without Signal).